We need a way to track whether a registrant was created as a walkup. In Check In v2 - we create the registrant but we use a standard registration form so there's no tracking if this person was in fact a walk-up registrant.

Proposed solution:

+ walkup registrant - Single Checkbox property

When JSON fires with behvior = walkup, we set the registrant property to 'yes'

Ideally, we also create a new list of walkup registrants